Encyclopedia of Membranes

2016 Edition
| Editors: Enrico Drioli, Lidietta Giorno

Leather Industry

Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44324-8_1350

In the leather industry, the animal rawhide is converted into finished leather, a durable and flexible material, through a series of chemical and mechanical treatments.

The steps in the production of leather between curing (a salt treatment to prevent putrefaction of the collagen) and tanning (a treatment of leather stabilization with vegetable or mineral substances) are collectively referred to as beamhouse operations. They include, in order, soaking, unhairing/liming, deliming/bating, and pickling. All these processes are realized in chemical reactors (tumblers) in which the skins react with different chemicals (acids, alkalis, chromium salts, tannins, solvents, sulfides, dyes, auxiliaries, etc.) in aqueous solutions (Fig. 1).
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References

  1. Cassano A, Molinari R, Romano M, Drioli E (2001) Treatment of aqueous effluents of the leather industry by membrane processes. A review. J Membr Sci 181:111–126CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Institute on Membrane Technology, National Research Council of Italy, ITM-CNRRendeItaly